ML19332B917

Forwards Special Rept 88-005 Re Results of Second Steam Generator Tube Inservice Insp Completed on 891118 During Third Refueling Outage,Per Tech Specs 4.4.5.5.b & 6.9.2

ML19332B917
Person / Time
Site:	Wolf Creek
Issue date:	11/14/1989
From:	Bailey J WOLF CREEK NUCLEAR OPERATING CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NO-89-0199, NO-89-199, NUDOCS 8911220024
Download: ML19332B917 (8)

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W$LF CREEK NUCLEAR OPERATING CORPORATION 1 '

N j@ . November 14. 1989

- os s NO-89-0199 g a

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U. S. Nuclear' Regulatory Commission  ;

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ATTN: Document Control Desk -)

p Mail Station P1-157.

Washington, D. C..'20555'

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Subjects- Docket No. 50-482:- Special Report 88-005 .

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. Gentlemen

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The attached Special' Report is being submitted pursuant to Technical Specifications 4.4.5.5.b and 6.9.2. This report provides the.recults of the-

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second~ steam generator tube inservice inspection which was completed on

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, November 18, 1989, during.tle third refueling outage.

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.If you have any questions concerning this matter..- please . contact! me or

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3' Mr. O. L. Haynard of my staff.

Very truly yours,

& . & y John A. Bailey ,L L

1' Vice President Nuclear Operations ,

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Attachment B. L. Bartlett (MRC), w/a l cc E. J. Holler (NRC), w/a R. D. Martin (NRC), w/a ,;

D. V. Pickett (NRU), w/a

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RO. Box 411/ Buritngton, KS 80839 / Phone: (316) 364-8831

' An Equel opportunny Employer MfMCWET  ;

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'\ Attr.chment to NO 89-0199

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• P g31 cf 7 l SPECIAL REPORT 88-005 4 l

SB00ED STEAN CEEERATOR TURE IESERVICE INSPECTICE RESULTS This report is being submitted pursuant to Technical Specification (T/S) l 4.4.5.5 b and 6.9.2 to report the results of the second steam generator tube l inservice inspection. .

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The second steam generator tube inservice inspection of steam generators '

(S/G) was completed by Westinghouse Electric Corporation on November 18, 1988, during the Refueling III outage. This inspection included all four steam generators, 'A', 'B', 'C', and 'D'. It was the first inservice- 1 inspection of S/G's 'A' and 'D' and the second for S/G's 'B' and 'C'.

A total of 11,889 tubes were inspected (52.8%), and a total of 22 tubes were plugged as discussed in Special Report 88-003, which was transmitted by ,

letter WM 88-0311, dated November 29, 1988. Included in this inspection j effort were three tubes which had been previously identified as having '

indications requiring re-inspection during this inservice inspection.

effort.. As discussed in Special Report 86-009, these tubes are R55-C62 and  :

R47-C99 in S/G 'B' and R36-C110 in S/G 'C'. The inspection results of S/G

• B" tube R47-C99 are tabulated in section 5 of this report.- During the f inspection of tubes R55-C62 in S/G 'B' and R36-C110 in S/G 'C' no reportable .;

indications were found.

In addition, this inspection effort encompassed five tubes with reportable indications during the preservice inspection. Thece five tubes are R23-C22 in S/G 'B' and R2-C19 R21-C64, R56-C77, and R41-C87 in S/C 'C#. Both the preservice inspection and first inservice inspection results for these tubes are delineated in Special Report 86-009. During the 1988 inservice inspection, no reportable indications were identified for any of these tubes. ',

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Reviews of the inservice inspection data to date have been unsuccessful in  ;

developing an explanation of the conditions leading to the disproportionate

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L number of indications of tube wall thickness loss identified in S/G 'D'.

1. Number and Extent of Tubes Inspected:

A. Steam Generator 'A's A total of 2,969 tubes were inspected full length.

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B. Steam Generator 'B's A total of 2,972 tubes were inspected full length.

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Steam Generator 'C's A total of 2,973 tubes were inspected full t- length.

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l. D. Steam Generator 'D's A total of 2,975 tubes were inspected full

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length.

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2. Identification of Tubes Plugged

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'A. Steam Generator 'A' 51 78 .;

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B. Steam Generator 'B' 54 59  :

C. Steam Generator 'C' 14 17 '!

T, 28 56

j~ 28 76. {

r D. Steam Generator 'D' 41 20 '

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L 42 20 L 43 20 l' 45 21-

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43 22 f 44 22 -

45 22 [

47 24 48 25 ,

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48 27 50 28 _;

47 29 i 45 -58'

• 49 60-44 '

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50 95 48 98 9

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3. Location and Percent of Wall Thickness Penetration for Each Indication' of an Imperfection:

Kev For Indication Lists TSH Top of Tubesheet-Hot Leg Side TSC Top of Tubesheec-Cold Leg Side BPH- Baffle Plate-Hot Leg Side BPC Baffle Plate-Cold Leg Side fH. FC (f = number) of Support

,, Plate Hot Leg or Cold Leg Side AVf Anti-Vibration Bar (i = number)

P Tube Plugged, following I of Wall Thickness Loss

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Indication I of Wall Thickness Loss Inch (+) Distance Measured from reference point (AV' from Bar, Baffle Plate, Tube Support Plate, Location etc.)

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~ ' '.' Tube Indications in Steam Generstor 'A' {

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Row. Column- Location / Leg .

Indication Inch (+)

(! of Wall Thickness) From Location' 45 32 AV4 <20 0.00  !

45, 35 AV2 <20 '0.00 45 35 AV4' 23 0.00

4 3 38 AV3 25' O.00 ,

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51: 78 AV2 <20- 0.00 i 51 78 AV3 <20 :0.00 51- 178 AV4: 36P 0.C0 t' 51 78 AV5- 21 0.00  ;

39 80 AV6 <20 0.00 ,

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.39 86 AV4 <20 0.00

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t Tube' Indications in Steam Generator 'B' b

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Row Column Location / Leg Indication Inch (+) >i (I of Wall Thickness) From Location #

49 28 AV5 23. .0.00 l 48' 35 .AV3 22 0.00 -l 47' 53 AV3 <20 0.00  ;

54 55 AV5 20 0.00 9 54 55' AV2 <20 0.00

50. 58 AV2 20 0.00 54 59 AV3 32P 0.00 45 63 AV6 <20 'O.00.

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'59 71- 6C <20 20.90

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47 96 AV4 <20 0.00 47I 98 AV5 21 0.00 ,

47 99 AV4 <20 0.00' 47 99 AV6 22 0.00 44 100 AV6 <20 0.00 45 101 AV5 <20 0.00 '

L 44 102 AV4 <20 0.00.

l 44 102 AV6 25 0.00 h 41 104 AV6 <20 0.00 1

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Tube Indications in Steam Generator 'C'

'i Row- Culumn Location / Leg' Indication Inch (+)

(I of Wall Thickness) From Location. -!

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I 35 15 AV2 <20 0.00 ,

ic 14 17 6H 36P 9.26 'i

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38 19 TSC 24 9.75

• h 49 35 7C 26 0.00 O 49- 36 AV3 <20 0.00 ,

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'27 49' BPH 32 14.32

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-28 52 BPH <20.

27 53 BPH 30~ 14.80

, 28 54 BPH 23- 16.97 I 28 56- BPH 37P '16.75_  !

t 6.- 28 76 BPC 45P. 14.28 ~l

~49 84 AVS 29 0.00. 3 49" 88 AV3 <20 0.00 49 88 AV4 29 0.00 '

!~ 40 103 AV4 <20 0.00 40 103 AV5 25 0.00 34 109 AV4 <20 0.00 l 35 109 AV4 23 0.00- l 35 110 'AV4 <20 0 . 0 0 -- l

35 '110 AV5 27 0.00 l

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Tube Indications in Steam Generator 'D'  !

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Row Column Location / Leg . indication . Inch (+)

(! of Wall Thickness)' - From Location (

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29' .10 AV5 22 0.00~  ;

334 13 AV4 23 0.00 ,

37. 15 AV4 22 0.00  ;

36 16 AV4 21 0.00 i l39 17 AV5 21 '0.00 ,

41 19' AV2 <20 0.00  ;

41 19 AV5 23 0.00 I 41 20 .AV4 30 0.00 .;

41 20 - AV5 32P 0.00 .

42. 20 AV3 ' 33 0.00- t

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42 20 AV6 36P 0.00 43 20 AV1 21 0.00  ;

43 20 .AV3 73P 0.00 i

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43 20- AV5 '23 0.00' 43 20 AV6 22- 0.00

42 21 AV3 20 0.00 42 21' AV5 28 0.00 t 42 21 AV6 <20 0.00 43- 21 AV5 45P 0.00 l 44 21 AV3 <20 0.00 ,

44 21 AV5 29 0.00 t 44 21 AV6 23 0.00-43- 22 AV4 40P 0.00.

44 =22- AV4 41P 0.00 0.00

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44 22 AV5 40

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45 22 AV3 20 0.00 45 22- AV5 36P 0.00 'l 44 23 AV3 <20 0.00 '

44 24 AV4 22 0.00 ,

44 24 AV5 22 0.00' i 45 24 AV5 <20 0.00 47 24 AV2 24 0.00 i 47 24 AV3 29 0.00  :

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47 24 AV6 30P 0.00 0.00

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48 25 AV1 22 48 25 AV4 56P 0.00  :

'48 25 AV5 28 0.00 l 46 27' AV6 <20 0.00 l 48 27 AV2 24 0.00 5 48 27 AV3 <20 0.00  !

48 27 AV4 33P 0.00 -

=48 27 AV6 <20 0.00 49 28 AV5 21 0.00 50 28 AV1 27 0.00 50 28- AV2 29 0.00 50 28 AV3 21 0.00 l' 50 28 AV5 42P 0.00 ,

b 47 29 AV4 31P 0.00 l

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Tube Indications in Steam Generator-'D' feontinued) i

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Row Coltan Location / Leg Indication Inch (+)

(2 of Wall Thickness)' From Location ,

53 33 AV4 <20 0.00 53' 33 /N6 26 0.00 45 .47 AV3 24 0.00-52 47 AVS 23 0.00 45 48 AV3 <20 0.00 50 52 AV3 <20 0.00 ,

50 52 AV4 24 0.00 45 58 AV4 30P 0.00 '

-45 58 AV5 24 0.00 49 60 AV2 30 0.00  !

'49 60 AV3 36P 0.00 45 64 AV3 27 0.00

$0 66 AV3 27 0.00 '

50 67 AV3 20 0.00 44 72 AV3 26 0.00 44 72: AV4 33P 0.00 .

44 72 AV6 21 0.00 50 75 AV2 22 0.00 50 82 AV3 23 0.00

'45 85 AV3 <20 0.00

'28 88 BPH <20 16.55 "

51 89- AV3 <20 0.00 ,

45 94 AV5 27 0.00 .

• 45 95 AVS 22 0.00

$0 -95 AV4 34P 0.00 50 95 AV5 24 0.00 ,

50 95 AV6 25 0.00

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45 97 AV5 24 0.00- '

48 98 AV2 55P 0.00 48 98 AV3 28 0.00 48 98 AV4 30 0.00 45 101 AVS 20 0.00 +

36 110 AV2 27 0.00 L 30 114 AV5 <20 0.00 28 115 AV6 21 0.00

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